Rotary pump.



A. GOTOLL.

ROTARY PUMP.

APPLICATION TILED Age. 13, 1910.

Patnted June 6,1911.-

n. 4 b n a 6 H m i Z 7 A. OOTOLI.

ROTARY PUMP. uruoumu rI'Lnn AUG. 13, 1910.

Patented June 6, 1911.-

z ennui-511111112.

cation.

. UNITED-STA- To all whom it may concern:

Be it known subject of the Habana, Cuba,

and useful Improvements in Rotar Tits OFFICE.

n wromo coroLr, bi nsert, ctr-3A.,

smn r m? I p q i n Let s me fettehted J. ime 6, 1911. Application nie'a,August 13, 1919;"-

that I, ANTONIO OoroLi, King of Spain, residing at have invented certainnew of which the following is a speci cation.

The present invention relates to improve ments in 'rotarydpumpsadapted'for raising or forcing lu u-1'" s or other gases,

and 'for compressing air and the primary objects of the invention are toprovide a novel pump of this type wherein the inlet and outlet-- portsof the piston chamber are so located that this chamber may always remainfull of liquid orgo s when =the"operat-ion of the.

pump is interruptd 'thereby preventing backflow. of the this type withtially in the form-pf shutters which :areso mounted that theywillfopenfor expand to while each-{shut er: 1s rotetannularpatlhantheses'h ut will'eollepse and remain .in-J

impel the fluid ing through its ter-like pistons active while,following" the remainden of their annular course with the" result {thatthe ump will auses; fllliCF V entinvention,

due to inertia otthe only exposed to the fluid while they are, ex;

panded or opened are acting. on-theflu i'df to impel it, there being noloss ofzpower due to friction between h fluid while the pistonsarefollowingthe en active portions f To these and other ends, the'i Hconsists in certain improvements, and-come.

of pa'rts, all as binations and novel features larly in arrangements vwill be hereinafter more fully described,';, t he pointed out partic'w"t the claimsat e end of the specifithe pistons; an

of their course.

being In the accompanyin drawingz'Figure 1 is a pers ective view 0 apump constructed 1n accor ance with .my present invention;

Fig. 2 represents a section through the pump taken centrally to itsaxis, an

rangement of the parts; Fig. 3 represents thereof and at right angles dshowing the interior arpiyotedshu tter-like pistons; Fig. Pumps,

,ti'v'elyg "and these parts are is provided with the ,chamber continuousflow of the with constant end. uniform" velocity.- thereby avoidinglosses fluid and; moreover, according tothe-presthe, shutter-likepistons are} ports being preferably incline substantially to thedirection of flow of the these which is a rig; No. 5763,94.-

anaxialv section through the pump on the line 3 j :31.of Fig,2';,F1 4 isa perspective view of th'e innergframe which carries the 5 is aperspective"vi'ew of the driving shaft of the pump;' Frig -b illustratesthe franie shown in Fig. 4 n elevation; Fig. 7 represents an inner" viewof, the 'rear 'eo'ver plate; Fig. 8 is--an"inner view {ogf the .frontcover plate; and F ig.,9 shows in elevation the intermediate ring havingthe piston chamber and the iiilet' and discharge pipes connectedthereto. Similar arts are designated by the same reference" charactersin the several views.

The. pump in the-present instance is composed generally of a rear coverplate 1, an lntermediate ringfl, a front cover plate. 3,

end-an inner revoluble frame or piston carri'e'r,-4.'" 'The ringj2is'int-erposed between the rear andifrontfcover plates .1 and 3 rescfirmly united by the screwsor bolts 5 arranged in the open- ,ings 6formediin the cover plates 1 and The ring 2 which I to contain thepistonsxhas inlet-and discharge ports 7 and 8"formed therein at oppositeoints, these d to conform and the interposed ring2.

fluidin entering and leaving the pump, and ports communicate with thesuction and;-"d1scharge pipes 9 and 10 respectively. Thesejpipesmay beattached to the pump in -'suita;bl e manner, they being providedhepreseilt instance with flanges 11 and 12 I 2 here seatedupon theexterior of the ring and jere secured-in' position by the Screws and Thepist portion 2- is concentric, with carrier 4.KTh'e lower portion 2" ofthe piss ton ,chainbe'ris also formed as an are of 'a, circle, butithafs a to'the portion .2 by the straight or tangential portion 2' atone end and by a some- What abru t portion 2 at its opposite end jaoento the discharge port 8.

on, chamber within the ring 2 has a substantlally semi-circular por-"tion 2,'g'toward the top. of the pump and this s micircular the axis'offthe-revolubIe frame or piston,

greater radius. than the radius of the-portion 2': and it is connectedThe rear cover plate 1 may be provided with suitable; means forsupporting the pump, it having in the present instance a pair of laterallugs having apertures 16 to receive screws or bolts by means of whichthe pump may be secured to any upright support. The inner surface ofthis rear cover plate 1 is formed with a circular groove or channel 17which is concentric to the axis of rotation of the frame or carrier 4.This plate 1 also has an inwardly extending projection 18 which is ofapproximately semi-cylindrical form, it having a concentric andsubstantially semi-circular peripheral portion 18 toward its upper sideand which is opposed to and paralleL'with the semi-circular portion 2 ofthe piston chamber in the ring 2, and the under side of this extension18 hasa reduced portion 18 which leads to the peripheral .18 by thesinuous surface 18, this portion 18 of the periphery of the extensionbeing somewhat abrupt or prominent. The forward face of the extension 18has 'a groove or channel 19 formed therein which is concentric with theaxis of rotation of the frame or piston carrier 4 and the extensionis'provided with abore' 20 which forms the axis for' the grooves 17 and19 and the surfaces 2 and 18, this bore 20 being adapted to receive thedrivin shaft 21 for the pump. This bore 20 is also ormed toward .itsouter end with a counterbore 22 for a purpose to be' hereinafterdescribed.

The inner rotary frame or piston carrier 4 is composed in the" presentinstance of a disk 23 and an opposed ring 2 1, the ring and disk beingarranged. parallel and concen-" tricallyand are maintained in properrelation by a-suitable nn-m'berof circumf'erentially' spacedcross-bars'25. The pistons 26 are mounted in the frame or carrierbetween the cross-bars, each piston being pivoted at 1 an intermediatepoint to the disk23 and ring 24 respectively. Each piston26-is in substantially the form of'a shutter having an I arc-shaped contour in alongitudinal direction, a pivot 27 being-connected to each shutjter at apointintermediate its length and cotiperates and forms a ,drivirz?connection being-journaled respectively in the disk 23 and the ring 24whereby the piston-like "shutters are permitted to swing about thesepivots as axes. The swinging .motion of each shutter, however, islimitedby an arc-' shaped projection 28 which is formed on the innerface of the disk '23, these pr0j.ec-'

tions 28 operating freely inthe concentric oove or channel 19 in theextension 18 uring rotation of the piston carrier; The

center of the disk 23 is formed with ahub 31 which -is revolublymounted. and supported within the countertbore -22 a1'idit has anangular opening 29 formed therein which portion with the collar 30 onthe driving shaft 21', this collar havinga corres onding angularperiphery. Each shutter-1i e pistonis provided toward its outer edgewith a roller 32 which when the shutter-like piston is in collapsedposition is accommodated by the notch 33 in the periphery of-the disk-23, but when the shutter-like piston is extended.

this roller 32 will operate in a groove or .18, they are opened orexpanded as shown I substantially in Fig. 2. by reason ofthe en--gagement of the. roller 32 toward the outer edge of each shutter-likepiston with the groove 34 formed in'the cover plate 3, each"shutter-like piston fitting the piston-space in the lower portion ofthe pump, and as these 5 pistons revolve in the direction indicated bythe'arrow .in Fig. 2, ,it is obvious that the fluid will be forcedcontinuously through I the pump, being drawn in by the suction pipe 9and ejected by the discharge ,pipe 1 0. The driving shaft 21 extendsthrough a cen tral opening 35 formed in the front cover plate 3, and theexposed portion of the driv- 10 mg shaft'may be provided with a beltpulley 37 p or a hand crank 38 whereby it may be revolved. ;,Theinterior wall 36 of the groove 3 1 cooperates with the rollers 32 uponthe outerends of the shutter-like. pistons and 10:- thereby retains theistons in opened position, each roller 32 ing thereby caused to followpositively the groove 34. i

The 0 eration of the pump may be briefly describes asfollows: Rotationof the pump 11" shaft or a'xle either by power applied by a: motor tothe belt pulley 37 or by hand to the crank 38 will cause the frame orpiston carrier to revolve within the pump casing and .in thedirectionindicated by the arrow in Fig. 2 131s each shutter-like piston approaches the s-met port 7 the roller 32 at its; outer end Will -leave,its respective notch 33 in the rotatable cairien and following thesurface 2", the 'outer endofthe piston will slide along the outerconcentridsjurface 2", the-roller 32 at this time following the---groove'or channel 34 in the front plate 3 and chamber and toward the I25{the next shutter-like the shutteg 56 o ened will advance the fluidthrough t "e 'st nI piston openspthe twopistons. will for? be I tweenthem a chamber containingthe l I t and this chamber will advance dnrinthe rotation of the piston carrier, towar the discharge port. As soon'as each iston also move inwardly until the piston occupies a positionin collapsed relation to the piston carrier, and further rotation of thepiston carrier will return this piston toward the inlet port while thepiston moves edgewise between the concentric surfaces 2 and 18. \Vhilethe pistons are traversing the space between the surfaces 2 and 18, theroller 32" on each piston will operate in the upper portion of thegroove 34, the pistons being t ereby held in collapsed position. In thismanner the pistons are successively opened and collapsed during eachrevolution of the piston carrier and as each piston is moving into itscollapsed position, the fluid is forced through the discharge port ofthe pump. While the shutters are returnin to the inlet port and betweenthe concen ric surfaces 2 and 18; they neither offer any resistance tothe fluid nor is the movement of the pistons im eded by the fluid and,moreover, the flow 0 the fluid into and through the pump is continuous.

I claim as my 1nvention:-

1. In a rotary pump, the combination of a casing having a. pistonchamber formed with concentric portions of different diameters andprovided with inlet and outlet ports which communicate with the pistonchamber at opposite points intermediate the concentric portions thereof,a carrier revolubly mounted in the piston chamber, a set of pistonsmounted on the carrier and movable to conform respectively to theconcentric portions of the piston chamber, the casing having a groovethe-rein embodying concentric portions of different diameterssymmetrical with the concentric portions of the piston chamber, andmeans on the pistons and cooperative with said groove whereby thepistons are 0 ened and collapsed during the rotation o the carrier.

2. In a rotary pump, the combination of a casing having a piston chamberformed with concentric portions of different diameters and provided withinlet and outlet ports which communicate with the piston chamber atopposite oints which are intermediate the concentric portions of thepiston chamher, a. carrier revolubly mounted within the pump casing, aset of pistons pivotally mounted on the carrier, the casing being formedwith a groove which is symmetrlcal with the circumference of the pistonchamber, devices on the pistons cooperative with said groove to open thepistons and cause the latter to cooperate with the concentric portion ofthe piston-chamber which is oflarger diameter and to collapse whiletraversing the concentric portion of the piston chamber of smallerdiameter, and an extension form ing part of the. casing and. arrangedwithin the revoluble carrier, said extension having a periphery whichcooperates with the pistons throughout the revolution' of'the carrierand prevents retrograde flow of the fluid while the pistons are actingthereon. I

3. 'In a rotary pump, the combination of a casing having a pistonchamber therein, one

wall of the piston chamber being formed u a piston. carrier.

with a circ ar groove, mounted within the casin and embodying a diskhaving a set of note es in its eri hery and an opposed ring, the ,diskavlng means for drlving it and the ring being revolubly journaled in thegroove in the casing, and a set of pistons mounted on the carrier andoperative in the piston chamber, each piston being provided toward itsouter edge with a roller which is accommodated by a corresponding notchin the periphery piston is in an inactive of the disk while theposition.

4. In a rotary pump, the combination of a" casing composed of opposedfront and rear plates and an interposed ring, the latter orming a pistonchamber, oneof said plates; having a segmental portion formed inte-'grally thereon and projecting inwardly into the piston chamber andsubstantially to the opposed plate, said portion having a bore and alsoa'count-erboreat one end, a driving shaft journaled in the boreof-saidinwardly projecting-portion, a carrier revoluble within thepiston chamber and embodying a disk,

having a, relatively short hub which'is journaled in the counterbore ofthe opposed inwardly projecting portion, said hub also having an angularbore to cooperate and form a drivlng connection with a correspondinglyshaped collar onvthe shaft, and

pistons mounted on the carrier and oper-- ative in the piston chamber.

5. In a'rotary pump, the combination of a casing composed of opposedfront and rear plates and an'interposed ring, the latter orming a pistonchamber having concentric portions of different diameters, the ringalso,

having inlet and discharge ports arranged at opposite points which areintermediate the concentric portions of the piston chamher, one of theplates having a circular groove and the other plate having a roove whichis symmetrical with the circurn erence of the piston chamber, acarrierrevolubly mounted in the casing-and embodyinga disk and an opposed andrigidly connected ring which is revolubly jourualed in said circulargroove, pistons mounted on the carrier' and operative in the pistonchamber, In testimony whereof I hate hereunto set 1 and devices on thepistons cooperative with my hand in presenceof two subscribing Wltv Ithe other groove in the casing which is syl nnesses.

metrical with the circumference of the p1s-. v ANTONIO COTOLI. 5 tonchamber whereby the pistons are auto- Witnesses:

mat-ically caused to follow the contour of Tmnxm' MAS,

the piston chamber. I 1 RICARDO Momi,

Copies of this patent may be obtained tor flve cents each, by addressingthe Commissioner otlatentl,

Washington, D. c." e

